Induction-meter.



v 1611A.l scm-:mm "INDUCTION METER. APPLICATION FILED AUGJO. |911.

4 SHEETS-SHEET l.

Eiga 53 l Witnesses; l

* v E f Atorgzqy a Pateted Nov. 2, 191.5.

G. A scHEEF'FE'n. INDUCTION METER.

APPLICATION FILED AUGJO. .ISH-

Patented Nov.f2,19'15.

4 SHEETSSHEET 2.

UNITED STATES PATENT OFFlCE.

GUSTAVE A. s'cHEFFER, Or INDIANAroLIs, NDIANA.

To all whom it may concernv Beit known that I, Gns'ixu'r.l A. SCHEEF- rnn, a citizen of the United States, residing at Indianapolis, in the countyof Marion and State of Indiana., have invented 1a certain new and useful Improvement in Induction- Meters, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.4 My invention relates to animproved Vform of construction of induction meters for measuring the quantity of electrical energy flowing through a given circuit,and`is characterized by an arrangement of parts 4such that the meter may be adjusted andrepaired with the greatest facility and that theva-` rious vparts employed may be'constructed and assembled with a minimum amountof vention are as follows: v

expense.` y A.

The several drawings illustrating my in-` Figure 1 is a front view of my meter complete with the cover in. place. Fig. 2 is a view similar' to Fig. 1 with the cover vof the meter proper removed, and also with al por-- tion of the cover of the termina-l boxV removed to show4 theI construction of the ter' minals. F l3 is aside View of the internal,-y mechanism of the meter, partially,insectioai,v to show. the relativer arrangement of ,fthe parts. In this ligure the casing is shopn'in section. Fig. l is a plan view of the diiving,

and braking ,mecha nism employed" in' 'the vnism used t 'drive the meter disk. Fi 7 is a detail sectional view of the termina construction and is taken along the ,line`7-7 in Fig. 2. Fig. 8 is4 a detail view taken-along.

' the line '8 8 in Fig. 2, and'shows a portion of the'clamping' means,employed to secure the braking magnet to its supporting bracket. Figs. 9 and 10 arie diagrammatic bottom and back views,-respectively, of a modified magnetic driving system.

Similar numerals refer to similarl parts throughout the several views.

As shown in Figs. 2 and 3, the back plate 1 of the meter is conformed to support the sheet metal casing 2 and the terminal block 3, the upper end of the back'plate 1, which.

may preferably. be of sheet metal, being extended Vatl 4 to support the meter and being provided, as shown in Fig. 2, with ears `to receivev additional supporting screws. The back plate 1 supports within the'casin .2 a

'Patented Nome, 1915. Application led August 10,1911. Serial 170.643,29?. f

bracket or framework 6,' preferably o cast metal, provided with arms 7 and.8 to sup.-l port the shaft 9 by means of bearings 10 and 411; The bearing 10'is held in place in the arm 7 by means of a set screw 12 and is conformed to engage the upper end of the shaft 9, as to make the friction ofthe operation .of the shaft a'minimum. The lower end of the shaft 9 is pointedand rests upon a jewel car- .'ried by the bearing, 'structions The be from the arm 8 and is normally held in place by mally disposed aroundthe lowerend of the shaft 9, being prov'ided with a clearance opening so that it is not in engagement with I such sha-ft, and is `provided with. a pin 15 extending through thearm 8 and 'headed at its lower end. he springs 13 and ,14 are secured at their left-hand ends, as shownin AI`ig 2, to.the arm 8. The spring 14 thus serves' to prevent accidental displacement of the shaft 9 from the bearing 11. The shaft '9 huil-S' Secured thereto a disk`16,.which travels at `the front of thev meter between the poles of'thev permanent vmagnet 17, one pole eX- which is of reduced cross `section so .1o as is Vusual 1n meter con-- arlng l11 1s vremovable a spring 13. A spring 14 `is nor-.-

tending below the disk, while theupper pole i is above the disk, extending in opposite directions and being substantlally parallel with'each other andv l with vthe disk, thus 'forming a damping magnot having a single air gap, instead of a double air gap as has been proposed here'- tofore in the art. rounded by a stamped .clip 18 which extends 'The magnet 17 is sur-l the poles of the magnet over the forward'end ofthe arm 7 and is secured thereto by means vof binding screws' 19 extending through the plate 20, which lits in the openings in the clip, 18 and is V,gage the lower ends of the screws 19 to prepreloof vented from displacement from the clip by vent marring of the top ofthe arm 7. 'Thus i a .meansl is provided by which the ma 17 may be moved with the clip-18and the clamping plates longitudinally of the'arm 7 to move the magnet toward or away from the shaft 9 and vthus adjust `the magnet- 17 'i gnet' t mechanismat 26","as shown in Figi for full load conditions to secure the right the arm 7 so that the-pole ends are properly disposed relatively to 'the disk.

The magnet 17 'isofsuiiicient size so that .the integrating mechanism '23 is supported within the magnetby means of`a 'bracket 2l the pin 15. by means of its headed lower end screwedto -the arm 7 at 25,' .as shown in-Fig. 4, such arm being 'secured to the integrating The integrating mechanism has secured to its drivingshafta crank 27 engaged ,an arml 28.car-r1ed by :i1-shaft 29,' which has secured thereto' a worm wheel 30`dri-ven by the worm 31 carriedby the shaft 9. The shaft 29 is supported `from the =arm7 bybearing arms i The disk 16 at its rear edgegi's disposed -between the 'polesof the series 'magnet 33 y and immediately -below the poles ofthe pressure magnet'34. The core of the series magnet is made of hollow rectangular stampings slotted through one side to receive'the disk 16,

'" andthe core of'the magnet 34, is composed of U-shaped rectangulars'tampings between the lower ends 'ofwhich the stampings forming the-magnetY 33 are disposed at rightnnL gles to==the vstampin'g's forming the magnet 34, so that the upper. poleof the series magnet is disposed between the poles ofthe pressure magnet, as lil'esultfof which the luxl through the pressure magnet is caused-to;v traverse to'a great extent the upper pole. of,

the series magnet in a directionatright langles to the plane of thel starnpings.fr )rmingv the core' of; the `said seriesfrmagnet. They minute a: gapsbetweenthe-:stampings` ofM the core-ofthe "series magnetgcause a sui'licient' reluctance in the 'magnetic path of the pressure magnet so .that fthe magnetic `flux' 'between the poles of theI pressure magnet is caused to passte a certain extent downward l Vand through the disk 16 andthis actionfis changed by the effect .of the' series magnetwhen eliergizedbyxthe series coil 35 disposed upon theflower limbfof thel core of the said.'

magnet,jas a vresultgofwhich.the effectiveM magnetic ilux l through/ the disk 16r vwhich causes rotation of, said diskis varied proper# tionally gto. the' current flow through the pressure magnet. 34. i nets 33 and 343are bolteditogether as indi#Y cated and securedv together .by...means 'ofi!v being providedfjuivitlr binding screws 49,

while the outere'rid's vare engaged by nuts=5 0. 'disposedA in enlarged recesses made to receive plates 37,`the"entire structure being held in place in ythe meterby-bolts .38 extending)` through the vflangey 39 ,formed upon the arm 7.l

The supporting frame (ijs of rectangular construction, asyindicated in Fig. 5, so that if it is desired to remove the magnetic 'system from the framework, the framework and parts supported thereby are first reymoved -from the casing 2 by unscrewing the so as to release the lower end of the shaft 9,

4for which condition the 'shaft 9 and disk 16 may be'moved` toward the observer, as seen in Fig. 3, withoutV disturbing thel driving magnets orthe braking magnet. lt is to be observed also that if for any reason;the

braking magnet must be removedfrom the arm 7, this can be done without disturbing either thedisk 16 orthe integrating mechanism` p If for any reason it is desired to remove the lntegratmg'mechamsnn thls ma be 4done by unscrewingthe screws 25, whic Will not disturb in any way the adjustment ofany ofthe magnets orlthe meter shaft 9 and parts connected therewith. Thus, any part may be removed for repair 'very' readily and the meter construction as a whole need not, be taken apartto getat any desired por# thezmeter, which has'fa sight opening in its front wall protected by'a'plate of glass 42 The sheet metal cover 41 -is provided for sothat the reading ofithe integratingmecha- .nism 23 may be observed.y gasket 43 is employed .between the-'cover 41'- and the casing 2 to mak'eza tightA jointbetween the Atwo parts,

.such cover being 'held in place byv a'niit44- engaging. alpost "'45 'extending outward n through thefco'ver; from onefof'tne nuts '40, A

asv shown in FiglfQ. *f The nut' 44 may be sealed in plv'a'ce"relatively' to the'p'ost 45 by means of a seal46, asis'customaryin the art,.if desired.' y

In some constructionsitimaybe desirable :to use fewerstampingsin the corex o f the series magnet than-required toA fill the space between the poles of the'core 34 of the pressure magnet, and in thiscase, as shown in lFigli, the remaining spacev between the oles lof the pressure magnet'is preferably lled -byv extrav piecesof stampings 33* so as'to af- 'ford @a comparatively good magnetic path between the'pol'es ofthe pressuremagnet.

side of the'casing 2 has'fornied thereiria plurality o1 slots 47 in which terminal b'ars 48l them in tlie terminal block 3. The nuts 50 engage the outer ends of the bolts 51 extend- `ing through the bars 4S, and besides holding kyThe terminal block 3 secured to the lower flux from the shunt core 3.4 crosses the comparatively small air gaps and completes its circuit through the stampings 34 provided.

for that purpose,a comparatively small portion of the flux passing through vthe disk.v As a result, with this arrangement the series core and shunt core are entirely independentv of each other and the flux from one core has no part of its path common with the path of the iux .from the other core. I therefore provide a construction in which a first iron core. is energized by a windinghaving a large number of turns which constitutes a shunt winding yfor the meter, the

core of such winding forming almost a coml plete lmagnetic circuit which producesv a high -inductance, and in conjunction with all of the iux from. which is directed through-the movin-g element of .thefmeter independently of the flux from the shunt core,l

the series flux being in a different` plane from that through the shunt vcore and traversing no part ofthe shunt core.

From the above description it will appear that by 'my' invention the series and pressure magnets are so' arranged that they properly co-ac't to cause rotation of the armature disk 16 proportionally to -theenergy fiowing" in the circuit-measured and .fthat the larrangementv described is operative `v for variations 'either in'pressure or current How in such circuit. It will also appear that. the meter construction is simple to make, since most of the parts may be formed of sheet metal. Only one braking magnet is used and this -consists but of aY` single piece of metal, and all of the parts are so disposed that the meteris of extremely small size, andfurther that any of the parts may be removed from the meter structure without disturbing the adjustment of the other parts.

lWhile' vI have described my invention inY connection with the particular arrangements Ashown inthe drawings., I donot limit myself. to this construction, but may employ equivalent arrangements without departing from the spirit of my invention.

What I claim is: 1. In an electricity meter, 'the combina-` tion of a rotatable shaft, a rotating element on said shaft, a framework, upper and lower bearing studs forthe shaft supported by the framework, the lower bearing stud project ing` abovethe framework, a spring guard,

. through which saidshaft passes, 'said open- .ing being larger than the diameter o'f the lower bearing stud, and means for drawing the modified magnetic system shown i this shunt core I employ a series winding of a vfew turns of large wire on anA ironcore, j,

, the pressure magnet and the other upon the.

' of a'pressure ma the guard member down rover said stud until it clears the lower end ofthe shaft. y

2. -In an electricity meter, the combination of-a rotatable shaft, a framework, upper and lower ,bearings for the shaft supportediby,A

the framework, a spring guard member car' ried by the frame and encircling the lower endof the-'shaft to prevent displacement thereof, saidguard member extendingv beyond said shaft, and a` headed pin extending. from the outer end of the guard member to withdraw it from ,the'plower vend of the shaft. H

3. In an electricity meter, the combination of a rotatable shaft, a disk carried by the shaft, a .pressure'jmagnet having a core composed of laminations disposed entirelyl on one side of the'disk, and a series magnet having a cere composed lof laminations disposed in Aplanes substantially at right" angles to the plane of'laminations of'the pressure magnet, the poles of the series magnet being located one between the poles of opposite side of the disk, said series core having laminations lying .between the poles of said pressure core and clampedthereto'.

' 4. In an induction meter, the combination ofv a .rotatable shaft, a disk carried by the shaft, a pressure magnet having its poles disposed adjacent the disk, a series magnet, and. stampings extending between the polesv of the pressure magnet, Iand being spaced therefrom to provide gaps in themagnetic material forvcausing part ,of the fiux to be diverted through the disk, said series magnet having one of its pole lpieces disposed between said poles of the pressure magnet.

5. In an induction meter, the combination of a-pressure ymagnet comprising a practically-closed riron magnetic circuit having relatively small ai1`-gaps, a moving element in proximity to the f poles of the magnet, through which said element only. part of the magnetic flux passes, an iron coreI a series winding on the core, said core embracing the movingmelement and having one pole dis: posed directly between the poles of the pressure magnet, but spaced from such poles to direct the magnetic flux' entirely through the moving, element independently of the flux from the pressure magnet.

6. In an. induction meter, the combination et comprising an iron core, pressure win ings upon the core,'said core having a comparatively small air gap between its poles, a rotary element in proximity to the poles of said core and disposed adjacent the pressure magnetso that part of its flux passe through said element7 a `serics winding, and an iron core forsaid serie's Winding having a portion on each side of saidrotary element,'said core being disposed partially between the poles of said f pressure magnet but magnetically independn ent thereof.

7. In an electric meter, thecombination of a moving element, a shunt coro havingay core vand'whavinig; all of its flux directed'-.

through the moving element, a serieQ Winding'on the series core, and vclamping.means to secure the pole-p1eces of said cores together, the magnetic paths of said cores beingindependent of each other.

In witness whereof, I hereunto subscribe' y'my name, this 4th, day of August, A. D. y 1911.

GUSTAVE A. SCHEEFFER. NVitnesses: Y

A. Gr.` Bmnn, C. H. MCUARTY. 

